The Model of Island Biogeography Is a Mathematical Model

question 33

Multiple Choice

The model of island biogeography is a mathematical model. How do we know it actually holds true in the "real" world?

• A) Mathematical models are always accurate
• B) Scientists collect data from real ecosystems to test it.
• C) The modelers tested it extensively in the field before they published it.
• D) The Simberloffs tested it in mangroves in Florida.
• E) We don't actually know, but it makes sense.

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Definitions:

Fixed Costs

Costs that remain constant for a set period of time, regardless of changes in the level of activity or volume of output.

Contribution Margin Ratio

The portion of sales revenue that exceeds variable costs, expressed as a percentage.

Fixed Costs

Expenses that do not change with the level of goods or services produced by a business.

Contribution Margin

The amount remaining from sales revenue after variable costs are deducted, indicating how much contributes to covering fixed costs and generating profit.